/mcpreceived that is incompatible with the call state. with the call state. Call setup timeout failure Typical scenarios include: No H.323 call proceeding • No H.323 alerting or connect message was received from the terminating gateway • SIP Invite expires timer reached the maximum number of retries allowed • 102 CC_CAUSE_RECOVERY_ON_ TIMER_EXPIRY Indicates that a procedure has been initiated by the expiration of a timer in association with procedures that handle errors. Parameter nonexistent or not implemented passed on (national use) The typical scenario is a configuration mismatch. 103 Indicates that the equipment that sent this cause has received a message which includes parameters not recognized because the parameters are not defined or are defined but not implemented on the equipment. A message with an unrecognized parameter discarded The typical scenario is an unrecognized parameter. 110 Indicates that the equipment that sent this cause has discarded a received message which includes a parameter that is not recognized. Protocol error, unspecified The typical scenario is a protocol error. 111 Reports a protocol error event only when no other cause in the protocol error class applies. Internal error The typical scenario is a device failed to send a message to Public Switched Telephone Network (PSTN). 127 CC_CAUSE_INTERWORKING Indicates that there has been interworking with a network that does not provide causes for actions it takes. The exact cause cannot be ascertained.